7131880 has 32 divisors (see below), whose sum is σ = 18339840. Its totient is φ = 2445120.

The previous prime is 7131877. The next prime is 7131889. The reversal of 7131880 is 881317.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (7131889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12456 + ... + 13015.

It is an arithmetic number, because the mean of its divisors is an integer number (573120).

Almost surely, 2^7131880 is an apocalyptic number.

7131880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7131880 is an abundant number, since it is smaller than the sum of its proper divisors (11207960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7131880 is a wasteful number, since it uses less digits than its factorization.

7131880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25489 (or 25485 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 7131880 is about 2670.5579941278. The cubic root of 7131880 is about 192.4869727508.

The spelling of 7131880 in words is "seven million, one hundred thirty-one thousand, eight hundred eighty".